sven: added Key_Delete for deleting mails. D still works.
sven: added Key_Delete for deleting mails. D still works.

svn path=/trunk/kdenetwork/kmail/; revision=10352

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi